Paging of Kernel Memory

Asutosh Das das.asutosh at
Thu Sep 8 02:54:07 EDT 2011

I think it also can mean that there is a 1-1 mapping in the kernel(except
for high mem) as there cannot be any page-faults in the kernel. So for
memory allocated in kernel, a physical memory mapping exists, thus lessening
the available physical memory.

On 6 September 2011 17:48, Vijay Chauhan <kernel.vijay at> wrote:

> Hi,
> i was going through the Linux Kernel Development book. It mention the
> following:
> "Additionally, kernel memory is not pageable.Therefore, every byte of
> memory you consume is one less byte of available physical memory."
> What is the meaning of 'Kernel memory is not pageable'? Anyone can
> give details would help me in understanding.
> Thanks,
> Vijay
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